Early name for Tol Brandir in Lord of the Rings drafts from the 1940s (TI/285, 367) glossed “Stone Pinnacle” (TI/345). It may be a combination of er or ereg “one, alone” and gonn “stone”, as suggested by Roman Rausch (EE/2.36).
Noldorin
ereg
place name. First
ereg
noun. holly-tree
ereg
adjective. first
ereg
noun. holly-tree, thorn
eregon
place name. Stone Pinnacle
eregion
place name. Hollin
eregdos
noun. holly, holly-tree
eregdos
noun. holly, holly-tree
nan-eregdos
place name. Hollin
edhen
adjective. first
er-
prefix. alone, one
Earlier name for the river S. Erui from Lord of the Rings drafts from the 1940s, apparently a Noldorin word meaning ereg “first” (TI/312, WR/436).